CN216374871U

CN216374871U - Crank chain wheel adapter and assembly

Info

Publication number: CN216374871U
Application number: CN202121670578.XU
Authority: CN
Inventors: 李俊辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-04-26
Anticipated expiration: 2031-07-22

Abstract

The utility model provides a crank chain wheel adapter and subassembly, its characterized in that, this adapter be equipped with crank complex crank mounting hole the outside of crank mounting hole is equipped with the outside extension arm that extends of a plurality of be equipped with first chain wheel mounting hole on the extension arm respectively be equipped with a plurality of second chain wheel mounting hole between first chain wheel mounting hole and the crank mounting hole, first chain wheel mounting hole and second chain wheel mounting hole can be used for installing the chain wheel respectively. The crank chain wheel adapter can be connected between a crank and a chain wheel, and a first chain wheel mounting hole and a second chain wheel mounting hole are formed in the crank chain wheel adapter and can be used for mounting two chain wheels. The crank chain wheel adapter provided by the utility model can realize the adapter between the chain wheel and the crank, reduces the requirement on replacing the chain wheel, improves the universality of products, reduces the cost for replacing the chain wheel, has strong practicability, and is suitable for being widely popularized.

Description

Crank chain wheel adapter and assembly

[ technical field ] A method for producing a semiconductor device

The utility model relates to the field of bicycle accessories, in particular to a crank chain wheel adapter and a crank chain wheel adapter assembly.

[ background of the utility model ]

The chain wheel is the part of the bicycle connected with the middle shaft and the crank. Under normal conditions, the chain wheel is connected with one end of a crank through a middle shaft, and the other end of the crank is connected with a pedal; the bicycle chain is arranged on the chain wheel; when riding, people drive the crank through pedaling the pedal, further drive the chain wheel to rotate, and finally drive the wheels to rotate through the chain and the flywheel, so that the whole transmission chain of the bicycle is completed.

When the chain wheel is deformed or broken, the chain wheel needs to be replaced. It is conventional practice to replace the entire dental plate directly. This kind of replacement mode, need supporting chain wheel just can change, and the cost of whole piece chain wheel is higher, consequently is unfavorable for improving the commonality of product, and is unfavorable for reducing the cost.

[ Utility model ] content

In order to solve the above problems, the present invention provides a crank crankset adapter and a crank crankset assembly, which can realize the adapter between a crankset and a crank and can simultaneously mount a plurality of cranksets.

The utility model aims to solve the problems and provides a crank crankset switching tool which is characterized by being provided with a crank mounting hole matched with a crank, a plurality of extension arms extending outwards are arranged on the outer side of the crank mounting hole, first crankset mounting holes are respectively arranged on the extension arms, a plurality of second crankset mounting holes are arranged between the first crankset mounting holes and the crank mounting hole, and the first crankset mounting holes and the second crankset mounting holes can be respectively used for mounting cranksets.

Furthermore, the extension arms are respectively provided with a convex boss, and the bosses are respectively provided with the second chain wheel mounting holes.

Further, the axial of crank mounting hole, first chain wheel mounting hole, second chain wheel mounting hole sets up along same direction, first chain wheel mounting hole, second chain wheel mounting hole along circumferencial direction evenly distributed, and its circumference center with the centre of a circle coincidence of crank mounting hole.

Furthermore, positioning parts for positioning and installing the chain wheel are respectively arranged on the extension arms.

Furthermore, the positioning part is a convex part protruding out of the surface of the extension arm, and the convex part is located between the first chain wheel mounting hole and the second chain wheel mounting hole.

Furthermore, the crank mounting hole is a through hole, and a positioning tooth part matched with the crank is arranged on the inner wall of the crank mounting hole.

Further, the crank mounting hole comprises a positioning hole and a mounting hole which are communicated with each other, the positioning hole and the mounting hole form a step hole, the positioning hole is provided with an opening communicated with the outside, and the opening is located between two adjacent extension arms.

Furthermore, the positioning hole and the second chain wheel mounting hole are respectively positioned on two opposite sides of the mounting hole.

Further, the first chain wheel mounting hole is a through hole, and the second chain wheel mounting hole is a blind hole.

In addition, the utility model also provides a crank chain wheel assembly which comprises the crank chain wheel adapter, a crank, a first chain wheel and a second chain wheel, wherein one end of the crank is matched with the crank mounting hole, the first chain wheel is fixed at the first chain wheel mounting hole, the second chain wheel is fixed at the second chain wheel mounting hole, and the first chain wheel and the second chain wheel are coaxially arranged.

The present invention advantageously contributes to effectively solving the above-mentioned problems. The crank chain wheel adapter can be connected between a crank and a chain wheel, and a first chain wheel mounting hole and a second chain wheel mounting hole are formed in the crank chain wheel adapter and can be used for mounting two chain wheels. The crank chain wheel adapter provided by the utility model can realize adapter, reduces the requirement on replacing the chain wheel, improves the universality of products, reduces the cost for replacing the chain wheel, has strong practicability, and is suitable for being widely popularized.

[ description of the drawings ]

Fig. 1 is a schematic structural diagram of a crank chain wheel adapter.

Fig. 2 is a schematic structural diagram of a crank chain wheel adapter.

FIG. 3 is an assembly schematic of the crank reel assembly.

FIG. 4 is an exploded view of the crank reel assembly.

The attached drawings are as follows: the crank comprises a crank 10, a shaft hole 11, a connecting table 12, a positioning tooth socket 121, a second screw hole 13, a crank crankset adapter 20, a crank mounting hole 21, a positioning tooth part 211, a first screw hole 212, a positioning hole 213, an opening 2131, a mounting hole 214, an extension arm 22, a first crankset mounting hole 23, a second crankset mounting hole 24, a boss 25, a positioning part 26, a first crankset 30, a first mounting hole 31, a second crankset 40 and a second mounting hole 41.

[ detailed description ] embodiments

The following examples are further illustrative and supplementary to the present invention and do not limit the present invention in any way.

As shown in fig. 1 to 4, the crank crankset adapter 20 of the present invention is used for connecting between a crankset and a crank 10, and can simultaneously connect a plurality of cranksets. Preferably, the crank handle adapter 20 is integrally formed, and the material for making the crank handle adapter can be selected according to the requirement, for example, it can be integrally formed by an aluminum alloy material.

As shown in fig. 1 and 2, the crank crankset adapter 20 is provided with a crank mounting hole 21, an extension arm 22, a first crankset mounting hole 23, a second crankset mounting hole 24, and a boss 25.

As shown in fig. 1 to 4, the crank mounting hole 21 is used to cooperate with the crank 10 to achieve connection between the crank 10 and the crank crankset adapter 20.

As shown in fig. 1 and 2, the crank mounting hole 21 is a through hole, and the shape thereof matches the crank 10. A plurality of positioning teeth 211 are arranged on the inner wall of the crank mounting hole 21, and correspondingly, the crank 10 is provided with a plurality of positioning tooth grooves 121 which are engaged with each other. When the positioning tooth part 211 on the inner wall of the crank mounting hole 21 is matched with the crank 10, the circumferential rotation of the crank mounting hole and the crank can be avoided, and meanwhile, the positioning assembly effect can be achieved, and the assembly is facilitated.

In order to fixedly connect the crank chain wheel adapter 20 and the crank 10, a plurality of first screw holes 212 for installing screws are further formed on the inner wall of the crank mounting hole 21.

As shown in fig. 2, the crank mounting hole 21 is provided to include a positioning hole 213 and a mounting hole 214 penetrating each other for the convenience of assembly and the strength of the crank head adapter 20. The positioning hole 213 and the mounting hole 214 form a stepped hole, so that one end of the crank 10 can be half-wrapped, positioning and assembling of the two can be facilitated, and circumferential rotation of the two can be avoided.

As shown in fig. 2, the shape of the positioning hole 213 matches the shape of the end of the crank 10, which facilitates the insertion of the end of the crank 10. Since the crank 10 is long, the positioning hole 213 is provided with an opening 2131 penetrating the outside so as not to interfere with the crank 10. The arrangement of the opening 2131 can also provide a positioning function for the matching installation of the crank 10, so that the crank 10 and the crank crankset adapter 20 can be conveniently and quickly butted together. The opening 2131 is located between two adjacent extension arms 22.

In the present embodiment, as shown in fig. 1, the positioning teeth 211 are provided on the inner wall of the mounting hole 214. The size of the mounting hole 214 is slightly smaller than that of the positioning hole 213, so that a stepped hole is formed.

As shown in fig. 1, a plurality of extension arms 22 are provided outside the crank mounting hole 21. The extension arm 22 extends outwardly in a cantilevered fashion. The shape of the extension arm 22 can be set as desired, and the embodiment is not limited thereto. The number of extension arms 22 can be set as desired, for example, it can be 4, 5 or more or less. In this embodiment, there are 4 extension arms 22 distributed around the periphery of the crank mounting hole 21 in a circumferential array.

As shown in fig. 1, the extension arms 22 are respectively provided with first crankset mounting holes 23. In this embodiment, the first crankset mounting hole 23 is located at a proximal end portion of the extension arm 22. The first crankset mounting hole 23 is a through hole, and an internal thread is formed on an inner wall thereof, which can fix the crankset to the extension arm 22 by a screw or a bolt.

As shown in fig. 1, in order to facilitate the positioning and installation of the crankset, positioning portions 26 may be respectively provided on the extension arms 22. The positioning part 26 may provide or form a step-like structure, so as to play a role of clamping and positioning the crankset. In this embodiment, the positioning portion 26 is a protrusion protruding from the surface of the extension arm 22, and is shaped like a strip, and a step-shaped structure is formed between the positioning portion and the surface of the extension arm 22, so as to block the crankset and achieve the positioning and assembling effect. The positioning portion 26 is not limited in shape, and is disposed on the opposite side of the extension arm 22 from the positioning hole 213. The positioning part 26 is provided near the first crankset mounting hole 23, and a distance therebetween may be set as required.

As shown in fig. 1, in order to install a plurality of crankshafts, a plurality of second crankshafts mounting holes 24 are provided between the first crankshafts mounting holes 23 and the crank mounting holes 21. The number of the second crankset mounting holes 24 may be the same as or different from the number of the first crankset mounting holes 23, and may be specifically set as required. In this embodiment, the number of the second crankset mounting holes 24 is the same as that of the first crankset mounting holes 23, and the number thereof is 4, and is the same as that of the extension arms 22.

Since a plurality of crankshafts are not installed in the same plane, a convex projection 25 may be provided on the extension arm 22 to facilitate installation of a second crankshafts. The boss 25 is located at a position between the crank mounting hole 21 and the first crankset mounting hole 23. The height of the boss 25 can be set as required, and it can provide a support plane to support and mount the second dental plate at different positions, so as to realize the stacked and staggered mounting of a plurality of dental plates.

As shown in fig. 1, the shape of the boss 25 is not limited, and in the present embodiment, it is cylindrical. The second chain wheel mounting hole 24 is formed in the boss 25. In this embodiment, it is a blind hole with internal threads on its inner wall, which can be screwed to secure the second chain wheel to the extension arm 22.

For the crank crankset adapter 20, the crank 10 and the crankset are respectively mounted on different sides, so that the bosses 25 and the positioning holes 213 are located on two opposite sides of the mounting hole 214.

As shown in fig. 1, the crank mounting hole 21, the first chain wheel mounting hole 23, and the second chain wheel mounting hole 24 are all axially arranged in the same direction. The first chain wheel mounting hole 23 and the second chain wheel mounting hole 24 are uniformly distributed along the circumferential direction, and the circumferential center of the first chain wheel mounting hole and the circumferential center of the second chain wheel mounting hole coincide with the circle center of the crank mounting hole 21. In other words, the crank mounting holes 21 are located at the center hole, and the first crankset mounting holes 23 and the second crankset mounting holes 24 are uniformly distributed in the circumferential direction and are distributed on the circumferences with different diameters.

Thus, as shown in fig. 1, the crank crankset adapter 20 of the present invention is formed with a first crankset mounting hole 23 and a second crankset mounting hole 24 for mounting two cranksets. The crank chain wheel adapter 20 can be connected between the crank 10 and the chain wheel, so that the crank 10 and the chain wheel can be switched, the universality of products can be improved, and the cost for replacing the chain wheel can be reduced.

In addition, as shown in fig. 3 and 4, the utility model also provides a crank chain wheel assembly, which comprises a crank chain wheel adapter 20, a crank 10, a first chain wheel 30 and a second chain wheel 40.

The structure of the crank gear wheel adapter 20 refers to the foregoing description, and is not repeated herein.

One end of the crank 10 is provided with a shaft hole 11 and a connecting platform 12.

The shaft hole 11 is square, penetrates through the connecting table 12, and is used for being connected with the middle shaft in a positioning mode and avoiding circumferential rotation.

The connecting table 12 and the crank 10 are integrally formed, a positioning tooth slot 121 is formed on the outer wall of the connecting table, and the positioning tooth slot 121 is matched with a positioning tooth part 211 on the inner wall of the crank mounting hole 21. In order to realize the fixed connection between the crank 10 and the crank chain wheel adapter 20, a second screw hole 13 is provided on the crank 10, and the position of the second screw hole matches with the position of the screw hole, and the second screw hole can fixedly connect the crank 10 and the crank chain wheel adapter 20 together through screws.

The first crankset 30 is hollow, and first mounting holes 31 are provided at positions corresponding to the first crankset mounting holes 23, respectively. In this embodiment, the first crankset 30 is provided with 4 first mounting holes 31. The first crankset 30 is provided with a set of teeth, and the design of the set of teeth can refer to the prior art.

The second crankset 40 is hollow, and second mounting holes 41 are respectively formed at positions corresponding to the second crankset mounting holes 24. In this embodiment, the second crankset 40 is provided with 4 second mounting holes 41. The first crankset 30 is provided with a set of teeth, and the design of the set of teeth can refer to the prior art.

The first and

second cranksets

30, 40 can be sized as desired. In this embodiment, the first crankset 30 is a large crankset, and the second crankset 40 is a small crankset.

When the crank is installed, the end of the crank 10 provided with the connecting table 12 is embedded into the crank mounting hole 21 of the crank crankset adapter 20, and then the crank and the crank are fixedly connected together through screws. The first crankset 30 is then placed on the extension arm 22, the first mounting hole 31 is aligned with the first crankset mounting hole 23, and the two are then fixedly attached together with a screw or bolt. And then the second chain wheel 40 is placed on the boss 25, the second mounting hole 41 is correspondingly arranged on the second chain wheel mounting hole 24, and the crank 10, the crank chain wheel adapter 20, the first chain wheel 30 and the second chain wheel 40 are fixedly connected together by bolts.

While the utility model has been described with reference to the above embodiments, the scope of the utility model is not limited thereto, and the above components may be replaced with similar or equivalent elements known to those skilled in the art without departing from the spirit of the utility model.

Claims

1. The utility model provides a crank chain wheel adapter, its characterized in that, its be equipped with crank (10) complex crank mounting hole (21) the outside of crank mounting hole (21) is equipped with a plurality of extension arm (22) that outwards extends be equipped with first chain wheel mounting hole (23) on extension arm (22) respectively be equipped with a plurality of second chain wheel mounting hole (24) between first chain wheel mounting hole (23) and crank mounting hole (21), first chain wheel mounting hole (23) and second chain wheel mounting hole (24) can be used for installing the chain wheel respectively.

2. The crank-crankset adapter according to claim 1, characterized in that said extension arms (22) are provided with respective convex bosses (25), said bosses (25) being provided with respective second crankset mounting holes (24).

3. The crank-crankset adapter according to claim 1, characterized in that said crank mounting hole (21), said first crankset mounting hole (23) and said second crankset mounting hole (24) are axially arranged along the same direction, said first crankset mounting hole (23) and said second crankset mounting hole (24) are uniformly distributed along the circumferential direction, and the circumferential center of said first crankset mounting hole and the center of said crank mounting hole (21) are concentric

And (4) overlapping.

4. Crank-crankset adapter according to claim 1, characterized in that positioning portions (26) for positioning and mounting said cranksets are provided respectively on said extension arms (22).

5. The crank crankset adapter according to claim 4, characterized in that the positioning portion (26) is a protrusion protruding from the surface of the extension arm (22), the protrusion being located between the first crankset mounting hole (23) and the second crankset mounting hole (24).

6. The crank-crankset adapter according to claim 1, characterized in that said crank mounting hole (21) is a through hole, and positioning teeth (211) matching with said crank (10) are provided on the inner wall of said crank mounting hole (21).

7. The crank-crankset adapter according to claim 6, characterized in that said crank mounting hole (21) comprises a positioning hole (213) and a mounting hole (214) which are through-connected, said positioning hole (213) and said mounting hole (214) form a stepped hole, said positioning hole (213) is provided with an opening (2131) which is through-connected with the outside, said opening (2131) is located between two adjacent extension arms (22).

8. The crank crankset adapter according to claim 7, characterized in that said positioning hole (213) and said second crankset mounting hole (24) are located on opposite sides of said mounting hole (214).

9. The crank crankset adapter according to claim 1, characterized in that said first crankset mounting hole (23) is a through hole and said second crankset mounting hole (24) is a blind hole.

10. A crank crankset assembly, characterized in that, it includes crank crankset adapter (20), crank (10), first crankset (30) and second crankset (40) as set forth in claim 1, one end of crank (10) with crank mounting hole (21) cooperation, first crankset (30) are fixed in first crankset mounting hole (23) department, second crankset (40) are fixed in second crankset mounting hole (24) department, just first crankset (30), second crankset (40) are coaxial setting.